Get random number from random.org

randomurl.go

package main

import (
	"fmt"
	"io/ioutil"
	"log"
	"net/http"
)

const (
	min = 1
	max = 100
)

func main() {
	url := fmt.Sprintf("https://www.random.org/integers/?num=1&min=%d&max=%d&col=1&base=10&format=plain&rnd=new", min, max)

	if resp, err := http.Get(url); err != nil {
		log.Fatalf("http.NewRequest: %v", err)
	} else {
		defer resp.Body.Close()

		if resp.StatusCode != 200 {
			log.Fatalf("Response status code: %d", resp.StatusCode)
		}

		if bodyBytes, err := ioutil.ReadAll(resp.Body); err != nil {
			log.Fatalf("ioutil.ReadAll: %v", err)
		} else {
			fmt.Printf("Random number [%d-%d]: %s", min, max, string(bodyBytes))
		}
	}
}